Centrifuge drum



F 1957 E. VAN DER MoLEN 2,806,603

cENTRFUGE DRUM Fi1ed Dec. 11, 1953 2 Sheets Sheet 1 p 7, 1957 E. VAN DER MoLEN 2,806,603

cBNTRIFUGB DRUM F11ed Dec. 11 1953 nited Sta e Patent o CENTRIEUGE DRUM 1veff van def Molen, (fonfngen, 1`efhef1ndS, asSignof fo KfausS-Maffef A. Gl, Munich-AHach, Gefmany App1icafion Decembef ll, 1953, Sefi1No. 397,o81

ClaimS pfiofify, app1fcaon Nefheflonds Decembef 13, 1952 10 C1aims. (CL 210380) The invention felateS to 3 cef1tfifuge dfum fof Sepa fating Solid constituenfs-ffofn liquid n1atefial to be cen tfifuged, inoontinuous opefation, the side vvall of the dfum having paSSage apeftufeS diSposed in the longitudinal difoction- In the centfifUging of liq11id of pulpy fnatefials pfefef ably in conical centfifuge dfun1S of thiS type, the viS cosity and hence also the ffiction betvveen the n1atefial and the waHS of the dfl1In continuously incfeaSes dufing its ov/ thfough the dfI1ff1, in consequonce of the gfadual eXtfaction of the liquid. Tfle paSSage of the Inatefial to be centfifuged thfough the dfufn iS thefeby fondefod dic11lt, So that it StayS thefein longef than is fequifed. In ofdef to obviate thiS diHiculty it has alfeady been pfopoSed to incfease gfadually the angle of inclination of the dfuIn vvallS to the axiS of the dfum in accofdance vith the incfeaSe in viScosity and ffiction ffon1 the inlet end towafdS to the outlet end, and fof thiS puf oSo to .give the centfifuge dfum an inyvafdly boWed Sided baSket shape. In the known oentfifugal dfun1 fufnished vvith cifcUlaf apeftufeS fof the Hquid, this shape fesultS in un ifnpeded and thefefofe favonfable ow of tho liquid thfough the dfun1 only When the inclination of the dfun1 waHS coffespondS to the pafticulaf natufe of the n1atofial to be centfifuged. In addition, in the knovvn centfifuge dfuIn having cifculaf apeffufos, the effective scfeening Sufface is decfeaSed With the continuously incfeaSing in clination of the dfun1 va1l, Since only the afea of the apeftufeS pfoiected at fightangleS to fhe dfuff1 aXis iS available fof the paSSage of the liquid.

In contfadistinction thefeto, the obiect of the inven tion iS to pfovide 3 centfifllge dfuIn which enSufes fof fnatefialS of any kind to be centfifuged an unin1peded paSSage and a unifofmly effective femoval of watof ovof the entife length of the dfufn.

Accofding fo the invention a centfifUge dfufn coff1 pfiSeS elongate nlefnbefs diS osed in felation to each ofhef to fofIn the side vvall of 3. dfuIn having an incfeaS- ing afea ffofn one end to the othef said fflefnbefS having paSSage apeftLlfes betWeen then1, and dfIlm end eleff1entS attached to the endS of Said n1en1befs, Said eloInents being fotatable in felation to one anothef. The-vvaHs Inay be bowed invVafds and the Said elefnentS afe in planes pafaHel to eaCh othef.

These n1eaSUfes pfovide a considefably advantageooS effect in that fhe ofoSsSecfion of the pasSage apeftufes available fof the fadial pasSago of the liquid iS not fe duced thfough the paSSage apeftufeS, Which pfefefably eXtend ovef the ontife length of tho dfUfn, even in the highly inclined paft of the lattef, So tht fefnoval of Vvatef ffoIn the fnatefial centfifuged iS 11nifofff1 ovef the entife watof eXtfaction path. Thfough the t11fnif1g of tho endS of tho dfun1 vvhich hold the plateS, bafS, of fhe like, fnofe ovef, eXtenSive adaptation of the inclination of the dfufn wallS to the pafticolaf natufe of the fflatefial centfifuged can bo achieved, With the -fufthef advantageouS feSI11t that the plafes, bafs, of tlle like afe bfought iflto the helical difection of )assage of the nlatefial cenffifuged Which 2 feduceS Weaf o1 the san1e. TheSe n1easufes thofefofe en- Sufe a good degfee of Watef fefnoval ffom the n1atefial centfifuged, high eHiciency of the centfifuge, and a long life of the centfifuge dfum,

ExelTlplified en1bodifnents of the invention afe illl1S- tfated diagfan1Inatically in the dfaWing, in which:

Figflfe 1 iS a Sectional vieW of a centfifuge d11fn Inade in accofdance vvifh the invention and in vvhioh the platos foffI1ing the vvallS of the dfllfn intefSect the axis of the dfum;

Figufe 2 is a pefspeotivo vievv of the centfifuge dfuIn vVith the end elefnents felafively fotated So that tho plateS take up a helical position;

Ffgufe 3 is a pefSpective vievv of a plate, the Sufface of which vVill fofn1 the in11ef vvall Sufface of the contfifuge dfun1 and consiStS of a polygonal coufSe of plane Suf faceS; and

FigUfe 4 is a Sectiona1 view of a conlplete sepafatof with a cenffif11ge dfufn accofding to the invention.

The fnatefial to be centfifuged iS intfoduced into a oentfifflge dfun1 2, diS osed veffically of f1oIiZontally in a centfifuge and vvidening in invvafdly bowed Sided fofff1 (like a .bow sided basket) towafdS the oI1tlet end 1, thfough an inlet pipe (not Shown in the dfawing) in ffont of the dfun1 end conSffucted as a diSc 3- 1)ufing the fotafion of the dfufn, fhe nlatefial to be centfifuged slideS Undef the action of centfifflgal fofce ovef the dfun1 wan 4, v/hich iS inclined in felatiof1 to the aXis of the dfufn, fo the diSchafge end 1 of the centfifuge dfllff1 2, ffofn vVhich tf1e nlatefial, depfived of watef on itS liding path, is thfown out and coHected Sepafately ffom the liquid thfovVn ()f f. Thfongh the bovVSided fofff1 of tho centfi fuge df11ff1 2, an oninlpeded How of the nlatefial to be centfifuged thfough the centfifuge dfum 2 iS obtained, becauSe the bfaking action of the ffiction of the fnatefial being centfifuged on the dfufn vva11, Which iS incfeasing because of the incfeaSe in viScosity o]1 the vvatef eXtfac tion path, is countefbalanced by the inclination of tho dfuIn vvall 4 Which incfeaseS tovvafds the oL1tlet end of the centfifuge dfufn 2. The dfuIn vvall 4 conSists of elongate fnefnbefS Such aS plateS s, bafS of fhe like, vVhich afe diSpoSed side by side in the longitlldina1 difection of the centfifuge dfum 2 With spacing adiuSted to the gfain siZe of the matefial to be centfifuged. The effect afea of the apeftufeS o, vvhich oXtend ovef the entife length of the dfufT1, is not feduced by fhe inclinatiof1 of the dfufn wall 4, Which incfeaseS in the difection of the outlet end of the centfifI1ge dfuIn 2. The endS of the plafes 5, bafs, of the like afe secUfed to dfun1 end elen1entS of fingS fof eXan1ple to a fing 7 pfovided at the outlet end of the centfifflge dfum 2 and at the opposite end of the dfnm to fhe diSc 3 sefving aS end vvall of fhe dfun1. Thfough a device not ilII1Stfafed in the dfavving the fings p ovided at the ends of tho dfun1 vvallS, of the fing 7 and the diso 3 can be fotated in felation to one anothef, and the inclination of the innef wan sflfface of the cenffifuge dfun1 2 felative to the dfUff1 aXis can thefeby be vafied. By this Ineans an adaptation of the incliflation of the wall sufface to the pafticulaf natufe of the n1atefial intfoduced, in fespect of itS viScosity, iS pefInitfed. Since the tufning of the fingS of of the fing 7 and the disc 3 is So effected that tho plateS S, bafs of the like, afe bfought into the helical paSSage difection of the nfatefial centfi fuged thfough the centfifuge dfun1 2, a feduction of the fUbbing of vveaf on the edges of the plates of bafs thfough the fnatefial cenffifuged iS achieved in advantageouS Inannef. T11e plates s, bafs, of the like afe pfefefably constfucted with a fectangulaf cfoSS-Section, and afe So dis poSed in the centfifuge dfum 2, that the fnaiof axis of this cfoSS-Section is difected fadiallyto the axis of the dfl1ff1. The ofoss-section of the plateS s, bafs, of the like need not hovvevef bo the Safne ovef fhe entife length of 

